.cont{
    width: 70%;
    margin:0 auto;
    .c_head{
        line-height: 50px;
        span{
            padding-left: 10px;
        }
        .red{
            color: red;
            cursor: pointer;
        }
    }
    .c_cont{
        dl{
            margin-top: 30px;
            margin-left: 20px;
            padding-bottom: 20px;
            height: 180px;
            border-bottom: 1px dashed #ccc;
            dt{
                float: left;
            }
            dd{
                float: left;
                width: 500px;
                margin-left: 30px;
                margin-top: 15px;
                h2{
                    font-size: 18px;
                    font-weight: bolder;
                }
                p{
                    font-size: 13px;
                    color: #666666;
                    text-indent: 25px;
                    margin:15px 0;
                }
                a{
                    float: right;
                    font-size: 12px;
                    color: red;
                }
            }
        }
    }
}
.back{
    width: 80%;
    margin:0 auto;
    height: 200px;
    .aa{
        float: right;
        margin-top: 50px;
        .up{
            display: inline-block;
            border-radius: 50%;
            margin-left: 5px;
            margin-bottom: 10px;
            cursor: pointer;
            text-align: center;
            line-height: 55px; 
            width: 55px;
            height: 55px;
            background: #666;
            color: #fff;
            font-size: 27px;
        }
    }
}